A Critical Review of Substrate Integrated Waveguide for Microwave Applications

This paper shows critical review of substrate Integrated waveguide (SIW) technology. Dielectric filled waveguide is converted into SIW with periodic arrangement of metallized holes on both sides of the it. SIW exhibit high pass response of conventional waveguide and band stop characteristics of periodic design. So filters designed using SIW exhibit less loss, less cost, less weight, high quality factor and high power handling capability. Various SIW passive and active circuits has been studied. Numerical method for modeling and design of SIW components is shown. A SIW has been designed showing insertion loss less than 0.1 dB. Design solutions for loss reduction are also discussed. Future design scope mainly aiming at Systems-on-Substrate integration of SIW components at higher frequencies including Ultra Wide Band range are also discussed.